|| ||John Stultz <firstname.lastname@example.org> |
|| ||LKML <email@example.com> |
|| ||[PATCH 0/2] [RFC] Introduce CLOCK_BOOTTIME |
|| ||Wed, 15 Dec 2010 16:40:46 -0800|
|| ||John Stultz <firstname.lastname@example.org>,
Jamie Lokier <email@example.com>,
Thomas Gleixner <firstname.lastname@example.org>,
Alexander Shishkin <email@example.com>,
|| ||Article, Thread
After some discussions with Jamie Lokier about some of the
drawbacks of CLOCK_MONOTONIC not incrementing during suspend
I wanted to see if we couldn't provide a new clockid that would
allow applications that wanted to be aware of time passing during
suspend without having to deal with the inconsistencies of
CLOCK_REALTIME caused by calls to settimeofday.
So this patchset introduces CLOCK_BOOTTIME, which is identical
to CLOCK_MONOTONIC, but includes any time spent in suspend.
This is just my initial stab at this, so I'd appreciate any comments
or thougths on these patches.
Jamie: On platforms that don't implement read_persistent_clock,
your issue would still be present, but fixing that is on my list.
Other then that issue, does this seem to address your concern?
Thomas: Let me know if the hrtimer_base indirection is too
gross. It just seemed silly to create 5 empty bases so we could
have an exact match between the clockids and the bases.
Arve: I believe CLOCK_BOOTTIME would be sufficient for what
Android is using as elapsedRealtime() or
ANDROID_ALARM_ELAPSED_REALTIME. If not please let me know why.
CC: Jamie Lokier <firstname.lastname@example.org>
CC: Thomas Gleixner <email@example.com>
CC: Alexander Shishkin <firstname.lastname@example.org>
CC: Arve Hj??<email@example.com>
John Stultz (2):
hrtimers: extend hrtimer base code to handle more then 2 clockids
hrtimers: Add CLOCK_BOOTTIME clockid, hrtimerbase and posix interface
include/linux/hrtimer.h | 22 ++++++++++++-
include/linux/time.h | 4 ++
kernel/hrtimer.c | 44 ++++++++++++++++---------
kernel/posix-timers.c | 16 ++++++++-
kernel/time/timekeeping.c | 79 ++++++++++++++++++++++++++++++++++++++++++++-
5 files changed, 146 insertions(+), 19 deletions(-)
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